Topband: 50 ohm direct burial coax cable

[mstangelo at comcast.net]

Bill,

Thanks. I will check it out.

Mike N2MS
----- Original Message -----
From: Bill Wichers <billw at waveform.net>
To: mstangelo at comcast.net, topband at contesting.com
Sent: Tue, 03 Jun 2014 14:58:51 -0000 (UTC)
Subject: RE: 50 ohm direct burial coax cable

Usually "direct burial" cable is just a PE jacket with a flooding compound in the braid. 

Times Microwave makes a direct burial variant of their LMR-400 called "LMR-400-DB". It adds a flooding compound in the braid. The flooding compound will seal small fractures in the jacket.

BTW, for everyone, there is a new "dry" type of water blocking compound used in fiber optic cables that is usually in the form of a powder or a yarn. When it gets wet it expands and seals the damaged cable area. It's lots easier to work with than the more traditional gel-type flooding compounds. Maybe if we're lucky we'll see someone start making coax that way!

  -Bill